/* ==========================================================================
   温州市笋块人工智能有限公司 — 官网样式
   ========================================================================== */

:root {
  --primary: #0D5BE9;
  --primary-dark: #0A47B8;
  --accent: #00A8FF;
  --dark: #0A1628;
  --dark-2: #0D2A5C;
  --bg-light: #F5F8FF;
  --bg-gray: #FAFBFD;
  --text-1: #1A1A2E;
  --text-2: #4A5568;
  --text-3: #8A94A6;
  --white: #FFFFFF;
  --border: rgba(13, 91, 233, 0.10);
  --shadow-sm: 0 2px 12px rgba(13, 91, 233, 0.06);
  --shadow-md: 0 8px 30px rgba(13, 91, 233, 0.10);
  --shadow-lg: 0 16px 48px rgba(13, 91, 233, 0.14);
  --radius: 14px;
  --radius-lg: 20px;
  --max-w: 1200px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.3px;
  color: var(--text-2);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; transition: color .25s var(--ease); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---------- Layout ---------- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section--gray { background: var(--bg-gray); }
.section--light { background: var(--bg-light); }

.section-head { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--primary);
  font-weight: 500;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: 1px;
  line-height: 1.4;
}
.section-desc {
  margin-top: 14px;
  font-size: 16px;
  color: var(--text-3);
  max-width: 660px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 1px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .3s var(--ease);
  white-space: nowrap;
}
.btn--primary { background: var(--primary); color: #fff; }
.btn--primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(13,91,233,.28); }
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.35); }
.btn--ghost:hover { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.6); transform: translateY(-2px); }
.btn--outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn--outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: all .35s var(--ease);
  border-bottom: 1px solid transparent;
}
.header__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo__img { height: 38px; width: auto; display: block; flex-shrink: 0; }
.logo__mark {
  width: 36px; height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 17px; letter-spacing: 0;
  flex-shrink: 0;
}
.logo__text { display: flex; flex-direction: column; line-height: 1.2; }
.logo__name { font-size: 17px; font-weight: 700; letter-spacing: 1px; }
.logo__sub { font-size: 10px; letter-spacing: 2px; opacity: .55; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 8px 18px;
  font-size: 15px;
  letter-spacing: 1px;
  border-radius: 999px;
  position: relative;
  transition: all .25s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 2px;
  width: 0; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width .3s var(--ease);
}
.nav a:hover::after, .nav a.is-active::after { width: 20px; }

.header__cta { display: flex; align-items: center; gap: 14px; }
.header__tel { font-size: 15px; font-weight: 500; letter-spacing: .5px; }

/* transparent state (on dark hero) */
.header--transparent { background: transparent; }
.header--transparent .logo__name,
.header--transparent .logo__sub,
.header--transparent .nav a,
.header--transparent .header__tel { color: #fff; }
.header--transparent .nav a::after { background: #fff; }
.header--transparent .btn--primary { background: rgba(255,255,255,.16); border-color: rgba(255,255,255,.3); backdrop-filter: blur(10px); }
.header--transparent .btn--primary:hover { background: rgba(255,255,255,.26); }

/* scrolled state */
.header--solid {
  background: rgba(255,255,255,.88);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--border);
}
.header--solid .logo__name { color: var(--text-1); }
.header--solid .logo__sub { color: var(--text-3); }
.header--solid .nav a { color: var(--text-2); }
.header--solid .nav a:hover, .header--solid .nav a.is-active { color: var(--primary); }
.header--solid .header__tel { color: var(--text-1); }

.nav-toggle { display: none; width: 40px; height: 40px; border: 0; background: transparent; cursor: pointer; position: relative; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: currentColor; margin: 5px auto; border-radius: 2px; transition: all .3s var(--ease); }
.header--transparent .nav-toggle { color: #fff; }
.header--solid .nav-toggle { color: var(--text-1); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0A1628 0%, #0D2A5C 55%, #0D3F8F 100%);
  overflow: hidden;
  padding: 140px 0 90px;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%; right: -10%;
  width: 640px; height: 640px;
  background: radial-gradient(circle, rgba(0,168,255,.22) 0%, transparent 68%);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -30%; left: -8%;
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(13,91,233,.20) 0%, transparent 68%);
  border-radius: 50%;
  pointer-events: none;
}
.hero__grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 78%);
}
.hero__inner { position: relative; z-index: 2; text-align: center; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 18px;
  font-size: 13px; letter-spacing: 1.5px;
  color: rgba(255,255,255,.88);
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  margin-bottom: 28px;
}
.hero__badge i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.hero__title {
  font-size: 62px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 4px;
  line-height: 1.25;
  margin-bottom: 10px;
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(120deg, #fff 20%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__slogan {
  font-size: 21px;
  color: rgba(255,255,255,.82);
  letter-spacing: 6px;
  font-weight: 300;
  margin-bottom: 22px;
}
.hero__desc {
  max-width: 720px;
  margin: 0 auto 40px;
  font-size: 16px;
  line-height: 2;
  color: rgba(255,255,255,.62);
  letter-spacing: 1px;
}
.hero__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 64px; }

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 860px;
  margin: 0 auto;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,.12);
}
.hero__stat { text-align: center; }
.hero__stat b {
  display: block;
  font-size: 40px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
  line-height: 1.2;
  white-space: nowrap;
}
.hero__stat b .suffix { font-size: 22px; margin-left: 2px; color: var(--accent); white-space: nowrap; }
.hero__stat p { font-size: 13px; color: rgba(255,255,255,.55); letter-spacing: 1.5px; margin-top: 6px; }

/* ---------- Page Hero (inner pages) ---------- */
.page-hero {
  position: relative;
  padding: 170px 0 84px;
  background: linear-gradient(135deg, #0A1628 0%, #0D2A5C 60%, #0D3F8F 100%);
  overflow: hidden;
  text-align: center;
}
.page-hero::before {
  content: "";
  position: absolute; top: -40%; right: -6%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0,168,255,.20) 0%, transparent 68%);
  border-radius: 50%;
}
.page-hero__inner { position: relative; z-index: 2; }
.page-hero h1 { font-size: 42px; font-weight: 700; color: #fff; letter-spacing: 4px; margin-bottom: 12px; }
.page-hero p { font-size: 15px; color: rgba(255,255,255,.6); letter-spacing: 3px; text-transform: uppercase; }
.breadcrumb { margin-top: 22px; font-size: 14px; color: rgba(255,255,255,.5); letter-spacing: 1px; }
.breadcrumb a:hover { color: #fff; }

/* ---------- Services ---------- */
.services { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  transition: all .4s var(--ease);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-card:hover::before { transform: scaleX(1); }
.service-card__icon {
  width: 56px; height: 56px;
  border-radius: 15px;
  background: linear-gradient(135deg, rgba(13,91,233,.10), rgba(0,168,255,.10));
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
  transition: all .4s var(--ease);
  color: var(--primary);
}
.service-card:hover .service-card__icon { transform: scale(1.08) rotate(-4deg); }
.service-card__icon svg { width: 30px; height: 30px; display: block; }
.service-card h3 { font-size: 19px; font-weight: 600; color: var(--text-1); letter-spacing: 1px; margin-bottom: 10px; }
.service-card p { font-size: 14.5px; line-height: 1.85; color: var(--text-3); }
.service-card__tags { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; }
.service-card__tags span {
  font-size: 12px; letter-spacing: .5px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--bg-light);
  color: var(--primary);
}

/* ---------- About preview ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; }
.about-text .section-tag { margin-bottom: 10px; }
.about-text h2 { font-size: 32px; font-weight: 700; color: var(--text-1); letter-spacing: 1px; line-height: 1.45; margin-bottom: 24px; }
.about-text p { font-size: 15.5px; line-height: 2.05; color: var(--text-2); margin-bottom: 16px; }
.about-text .btn { margin-top: 14px; }

.about-visual {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 46px 40px;
  background: linear-gradient(135deg, #0A1628, #0D3F8F);
  overflow: hidden;
}
.about-visual::before {
  content: "";
  position: absolute; top: -30%; right: -20%;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(0,168,255,.24) 0%, transparent 68%);
  border-radius: 50%;
}
.about-visual__list { position: relative; z-index: 2; display: grid; gap: 22px; }
.about-visual__item { display: flex; gap: 16px; align-items: flex-start; }
.about-visual__item i {
  flex-shrink: 0;
  width: 34px; height: 34px;
  border-radius: 9px;
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.16);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-style: normal; font-size: 14px; font-weight: 600;
}
.about-visual__item h4 { font-size: 16px; color: #fff; font-weight: 600; letter-spacing: 1px; margin-bottom: 3px; }
.about-visual__item p { font-size: 13.5px; color: rgba(255,255,255,.58); line-height: 1.8; }

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #0A1628, #0D3F8F);
  box-shadow: var(--shadow-lg);
}
.about-image::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 20%, rgba(0,168,255,.18) 0%, transparent 55%);
  pointer-events: none;
}
.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  position: relative;
  z-index: 2;
  min-height: 420px;
}

/* ---------- Sub brands ---------- */
.brands { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.brand-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  transition: all .35s var(--ease);
}
.brand-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.brand-card b { display: block; font-size: 17px; color: var(--text-1); letter-spacing: 1.5px; margin-bottom: 6px; }
.brand-card span { font-size: 13.5px; color: var(--text-3); letter-spacing: .5px; }

/* ---------- Entry cards (三栏入口) ---------- */
.entries { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.entry-card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 44px 34px;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  background: linear-gradient(140deg, #0D2A5C, #0A1628);
  transition: all .4s var(--ease);
}
.entry-card:nth-child(2) { background: linear-gradient(140deg, #0D3F8F, #0D2A5C); }
.entry-card:nth-child(3) { background: linear-gradient(140deg, #0D5BE9, #0A47B8); }
.entry-card::before {
  content: "";
  position: absolute; bottom: -40%; right: -20%;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,.10) 0%, transparent 68%);
  border-radius: 50%;
  transition: transform .5s var(--ease);
}
.entry-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.entry-card:hover::before { transform: scale(1.35); }
.entry-card__body { position: relative; z-index: 2; }
.entry-card h3 { font-size: 24px; color: #fff; font-weight: 700; letter-spacing: 2px; margin-bottom: 12px; }
.entry-card p { font-size: 14.5px; color: rgba(255,255,255,.65); line-height: 1.9; }
.entry-card__link { position: relative; z-index: 2; display: inline-flex; align-items: center; gap: 8px; color: #fff; font-size: 14px; letter-spacing: 1px; margin-top: 26px; }
.entry-card__link svg { width: 16px; height: 16px; transition: transform .3s var(--ease); }
.entry-card:hover .entry-card__link svg { transform: translateX(5px); }

/* ---------- Honors ---------- */
.honors { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.honor-item {
  display: flex; align-items: center; gap: 14px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all .3s var(--ease);
}
.honor-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.honor-item i {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(13,91,233,.10), rgba(0,168,255,.10));
  display: flex; align-items: center; justify-content: center;
}
.honor-item i svg { width: 20px; height: 20px; stroke: var(--primary); }
.honor-item span { font-size: 14.5px; color: var(--text-1); font-weight: 500; letter-spacing: .5px; line-height: 1.6; }

/* ---------- Client logos ---------- */
.clients { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.client-item {
  height: 88px;
  display: flex; align-items: center; justify-content: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14.5px;
  color: var(--text-2);
  letter-spacing: .5px;
  text-align: center;
  padding: 12px;
  transition: all .3s var(--ease);
}
.client-item:hover { color: var(--primary); border-color: rgba(13,91,233,.3); box-shadow: var(--shadow-sm); transform: translateY(-3px); }

/* ---------- Case cards ---------- */
.filter-bar { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-bottom: 18px; }
.filter-hint { text-align: center; color: var(--text-muted, #8a94a6); font-size: 13px; letter-spacing: 1px; margin: 0 0 36px; }
.filter-btn {
  padding: 9px 24px;
  font-size: 14.5px;
  letter-spacing: 1px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-2);
  cursor: pointer;
  transition: all .3s var(--ease);
  font-family: inherit;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.is-active { background: var(--primary); border-color: var(--primary); color: #fff; }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.case-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .4s var(--ease);
}
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.case-card__cover {
  height: 190px;
  background: linear-gradient(140deg, #0D2A5C, #0D3F8F);
  position: relative;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.case-card:nth-child(3n+2) .case-card__cover { background: linear-gradient(140deg, #0D3F8F, #0D5BE9); }
.case-card:nth-child(3n) .case-card__cover { background: linear-gradient(140deg, #0A1628, #0D2A5C); }
.case-card__cover::after {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
.case-card__cover span {
  position: relative; z-index: 2;
  font-size: 22px; font-weight: 700; color: rgba(255,255,255,.92);
  letter-spacing: 2px; text-align: center; padding: 0 20px;
}
.case-card__badge {
  position: absolute; top: 16px; left: 16px; z-index: 3;
  font-size: 12px; letter-spacing: 1px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.24);
  color: #fff;
  backdrop-filter: blur(8px);
}
.case-card__body { padding: 26px 26px 28px; }
.case-card__body h3 { font-size: 18px; font-weight: 600; color: var(--text-1); letter-spacing: .5px; margin-bottom: 10px; }
.case-card__body p { font-size: 14.5px; color: var(--text-3); line-height: 1.85; min-height: 54px; }
.case-card__tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.case-card__tags span { font-size: 12px; padding: 4px 11px; border-radius: 6px; background: var(--bg-light); color: var(--primary); }

/* ---------- Portfolio ---------- */
.work-groups { display: block; }
.work-group { margin-bottom: 52px; }
.work-group:last-child { margin-bottom: 0; }
.work-group__title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-1, #0D1B33);
  margin: 0 0 22px;
  letter-spacing: 1px;
}
.work-group__title::before {
  content: '';
  width: 5px;
  height: 20px;
  border-radius: 3px;
  background: linear-gradient(180deg, #0D5BE9, #00A8FF);
}
.work-group__title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border, #e6ebf2), transparent);
}
.work-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; align-items: start; }
.work-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border);
  transition: all .4s var(--ease);
}
.work-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.work-card__cover {
  aspect-ratio: 16 / 10;
  position: relative;
  background: linear-gradient(140deg, #0D2A5C, #0D3F8F);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.work-card:nth-child(4n+2) .work-card__cover { background: linear-gradient(140deg, #0D3F8F, #0D5BE9); }
.work-card:nth-child(4n+3) .work-card__cover { background: linear-gradient(140deg, #0A1628, #0D2A5C); }
.work-card:nth-child(4n) .work-card__cover { background: linear-gradient(140deg, #0D5BE9, #00A8FF); }
.work-card__cover::after {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
.work-card__play {
  position: relative; z-index: 2;
  width: 58px; height: 58px;
  border-radius: 50%;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.32);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  transition: all .35s var(--ease);
}
.work-card:hover .work-card__play { background: rgba(255,255,255,.3); transform: scale(1.1); }
.work-card__play svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.work-card__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 1; }

/* 海报设计为竖版封面，竖图基本不裁切，更美观 */
.work-card[data-cat="poster"] .work-card__cover { aspect-ratio: 2 / 3; }

/* 短视频以竖屏为主，封面改用竖版比例，与海报一致 */
.work-card[data-cat="video"] .work-card__cover { aspect-ratio: 2 / 3; }

/* 作品封面大图弹层（海报/推文/PPT 点击查看） */
.lightbox {
  position: fixed; left: 0; top: 0; right: 0; bottom: 0; z-index: 9999;
  display: none; align-items: center; justify-content: center;
  background: rgba(0, 0, 0, 0.88); padding: 24px; cursor: zoom-out;
}
.lightbox.active { display: flex; }
.lightbox__img {
  max-width: 92vw; max-height: 92vh; width: auto; height: auto;
  object-fit: contain; border-radius: 6px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
}
.lightbox__close {
  position: absolute; top: 18px; right: 26px;
  color: #fff; font-size: 40px; line-height: 1;
  cursor: pointer; user-select: none; opacity: 0.85;
}
.lightbox__close:hover { opacity: 1; }
.work-card__body { padding: 22px 24px 24px; }
.work-card__body h3 { font-size: 17px; font-weight: 600; color: var(--text-1); letter-spacing: .5px; margin-bottom: 8px; }
.work-card__meta { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-3); }
.work-card__meta em { font-style: normal; color: var(--primary); }

/* ---------- Team ---------- */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card {
  padding: 36px 28px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all .35s var(--ease);
}
.team-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.team-card i {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(13,91,233,.10), rgba(0,168,255,.10));
  margin-bottom: 18px;
}
.team-card i svg { width: 24px; height: 24px; stroke: var(--primary); }
.team-card h3 { font-size: 18px; font-weight: 600; color: var(--text-1); letter-spacing: 1px; margin-bottom: 8px; }
.team-card p { font-size: 14px; color: var(--text-3); line-height: 1.85; }

/* ---------- Culture ---------- */
.culture-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.culture-card {
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--border);
  transition: all .35s var(--ease);
}
.culture-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.culture-card b { display: block; font-size: 13px; letter-spacing: 3px; color: var(--primary); text-transform: uppercase; margin-bottom: 14px; }
.culture-card h3 { font-size: 21px; font-weight: 700; color: var(--text-1); letter-spacing: 1px; margin-bottom: 12px; }
.culture-card p { font-size: 14.5px; color: var(--text-3); line-height: 1.9; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 50px; align-items: start; }
.contact-info { display: grid; gap: 18px; }
.contact-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 24px 26px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all .3s var(--ease);
}
.contact-item:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.contact-item i {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(13,91,233,.10), rgba(0,168,255,.10));
  display: flex; align-items: center; justify-content: center;
}
.contact-item i svg { width: 20px; height: 20px; stroke: var(--primary); }
.contact-item h4 { font-size: 14px; color: var(--text-3); font-weight: 400; letter-spacing: 1px; margin-bottom: 4px; }
.contact-item p { font-size: 17px; color: var(--text-1); font-weight: 500; letter-spacing: .5px; line-height: 1.6; }

.form-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}
.form-card h3 { font-size: 22px; font-weight: 700; color: var(--text-1); letter-spacing: 1px; margin-bottom: 6px; }
.form-card > p { font-size: 14px; color: var(--text-3); margin-bottom: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; color: var(--text-2); margin-bottom: 8px; letter-spacing: .5px; }
.form-group label em { color: #E24B4A; font-style: normal; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text-1);
  background: var(--bg-gray);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: all .25s var(--ease);
  outline: none;
}
.form-group textarea { resize: vertical; min-height: 118px; line-height: 1.8; }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(13,91,233,.08); }
.form-card .btn { width: 100%; margin-top: 8px; }
.form-note { margin-top: 14px; font-size: 13px; color: var(--text-3); text-align: center; }

.map-box {
  margin-top: 28px;
  height: 340px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(140deg, #0D2A5C, #0D3F8F);
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.map-box::after {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 40px 40px;
}
.map-box__label { position: relative; z-index: 2; text-align: center; color: #fff; }
.map-box__label b { display: block; font-size: 20px; letter-spacing: 2px; margin-bottom: 6px; }
.map-box__label span { font-size: 14px; color: rgba(255,255,255,.6); letter-spacing: 1px; }

/* ---------- CTA banner ---------- */
.cta-band {
  position: relative;
  padding: 76px 0;
  background: linear-gradient(120deg, #0A1628 0%, #0D2A5C 50%, #0D5BE9 100%);
  overflow: hidden;
  text-align: center;
}
.cta-band::before {
  content: "";
  position: absolute; top: -50%; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 500px;
  background: radial-gradient(ellipse, rgba(0,168,255,.18) 0%, transparent 68%);
}
.cta-band__inner { position: relative; z-index: 2; }
.cta-band h2 { font-size: 32px; font-weight: 700; color: #fff; letter-spacing: 2px; margin-bottom: 12px; }
.cta-band p { font-size: 16px; color: rgba(255,255,255,.68); letter-spacing: 1px; margin-bottom: 32px; }
.cta-band__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-band .btn--primary { background: #fff; color: var(--primary); }
.cta-band .btn--primary:hover { background: rgba(255,255,255,.9); }

/* ---------- Articles ---------- */
.articles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.articles--home { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
@media (max-width: 1100px){ .articles { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px){ .articles { grid-template-columns: 1fr; } }
.article-card {
  display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden;
  text-decoration: none; color: inherit;
  box-shadow: var(--shadow);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
}
.article-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.article-card__cover { height: 150px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.article-card__cover svg { width: 42px; height: 42px; stroke: rgba(255,255,255,.92); }
.article-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.article-card__cover.c1 { background: linear-gradient(135deg, #0D5BE9, #00A8FF); }
.article-card__cover.c2 { background: linear-gradient(135deg, #6D28D9, #0D5BE9); }
.article-card__cover.c3 { background: linear-gradient(135deg, #0EA5E9, #22D3EE); }
.article-card__cover.c4 { background: linear-gradient(135deg, #0D5BE9, #7C3AED); }

/* ---------- 文章详情页 ---------- */
.article-detail { padding: 130px 0 90px; }
.article-tip { margin-top: 26px; padding: 18px 20px; background: rgba(13,91,233,.06); border-left: 3px solid #0D5BE9; border-radius: 10px; color: #555; font-size: 15px; line-height: 1.85; }
.article-detail .container { max-width: 820px; }
.article-back { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-size: 14px; font-weight: 500; margin-bottom: 32px; transition: color .2s; }
.article-back:hover { color: var(--accent); }
.article-head { margin-bottom: 26px; }
.article-head h1 { font-size: 34px; line-height: 1.32; margin: 14px 0 0; font-weight: 700; letter-spacing: .5px; }
.article-date { display: block; font-size: 14px; color: var(--text-light); margin-top: 10px; }
.article-cover { height: 320px; border-radius: 18px; margin: 8px 0 42px; overflow: hidden; }
.article-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.article-cover.c1 { background: linear-gradient(135deg, #0D5BE9, #00A8FF); }
.article-cover.c2 { background: linear-gradient(135deg, #6D28D9, #0D5BE9); }
.article-cover.c3 { background: linear-gradient(135deg, #0EA5E9, #22D3EE); }
.article-cover.c4 { background: linear-gradient(135deg, #0D5BE9, #7C3AED); }
.article-body { font-size: 16px; line-height: 1.95; color: var(--text); }
.article-body p { margin: 0 0 22px; }
.article-body h3 { font-size: 21px; line-height: 1.5; margin: 40px 0 16px; font-weight: 700; }
.article-body blockquote { margin: 30px 0; padding: 14px 22px; border-left: 4px solid var(--primary); background: rgba(13,91,233,.05); border-radius: 0 10px 10px 0; color: var(--text-light); font-style: italic; }
.article-body ul { margin: 0 0 22px 22px; list-style: disc; }
.article-body li { margin-bottom: 10px; }
.article-body img { max-width: 100%; height: auto; display: block; margin: 8px auto 24px; border-radius: 12px; }
.article-body section { margin: 0; }
.article-body p { text-align: justify; text-justify: inter-ideograph; }
.article-long-image { display: flex; flex-direction: column; gap: 0; margin: 0 0 18px; border-radius: 16px; overflow: hidden; box-shadow: 0 12px 40px rgba(0,0,0,.08); }
.article-long-image img { width: 100%; height: auto; display: block; margin: 0; border-radius: 0; }
.article-caption { text-align: center; color: var(--text-light); font-size: 14px; margin-top: 8px; }
.article-origin { margin-top: 44px; padding-top: 30px; border-top: 1px solid var(--border); }
.article-empty { text-align: center; color: var(--text-light); padding: 80px 0; font-size: 16px; }
@media (max-width: 768px) {
  .article-detail { padding: 100px 0 60px; }
  .article-head h1 { font-size: 25px; }
  .article-cover { height: 200px; margin-bottom: 28px; }
  .article-body { font-size: 15px; line-height: 1.85; }
}
.article-card__body { padding: 22px; display: flex; flex-direction: column; gap: 11px; flex: 1; }
.article-card__tag { align-self: flex-start; font-size: 12px; color: var(--primary); background: rgba(13,91,233,.08); padding: 3px 11px; border-radius: 20px; }
.article-card__body h3 { font-size: 17px; line-height: 1.45; font-weight: 600; }
.article-card__body p { font-size: 14px; color: var(--text-muted); line-height: 1.65; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card__meta { margin-top: auto; padding-top: 8px; display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text-muted); }
.article-card__more { color: var(--primary); font-weight: 600; }
.articles__more { text-align: center; margin-top: 38px; }

/* ---------- Case detail ---------- */
.case-detail .container { max-width: 1080px; }
.case-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; }
.case-main { min-width: 0; }
.case-aside { position: sticky; top: 110px; }
.case-facts {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 28px 26px; box-shadow: var(--shadow-sm);
}
.case-facts h4 { font-size: 15px; letter-spacing: 2px; color: var(--primary); margin-bottom: 18px; }
.case-facts dl { margin: 0 0 22px; }
.case-facts dl > div { padding: 12px 0; border-bottom: 1px dashed var(--border); }
.case-facts dl > div:last-child { border-bottom: 0; }
.case-facts dt { font-size: 12.5px; color: var(--text-light); letter-spacing: 1px; margin-bottom: 4px; }
.case-facts dd { margin: 0; font-size: 15px; color: var(--text-1); font-weight: 600; line-height: 1.5; }
.case-facts .btn { width: 100%; }
.case-lead {
  font-size: 17px; line-height: 1.9; color: var(--text-1);
  background: rgba(13,91,233,.04); border-left: 3px solid var(--primary);
  padding: 18px 22px; border-radius: 0 12px 12px 0; margin: 0 0 30px;
}
.case-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 26px 0 32px; }
.case-gallery figure { margin: 0; }
.case-ph {
  aspect-ratio: 16 / 10; border-radius: 12px;
  background: linear-gradient(140deg, #0D2A5C, #0D5BE9); position: relative; overflow: hidden;
}
.case-ph::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 28px 28px;
}
.case-gallery figure img { width: 100%; height: auto; border-radius: 12px; box-shadow: 0 4px 16px rgba(0,0,0,.06); }
.case-gallery--3 { grid-template-columns: repeat(3, 1fr); }
.case-poster-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin: 26px 0 32px;
}
.case-poster-grid figure { margin: 0; }
.case-poster-grid figure img {
  width: 100%; height: auto; border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,.08);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.case-poster-grid figure:hover img { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,.12); }
.case-poster-grid figcaption,
.case-gallery figcaption { display: block; text-align: center; font-size: 13px; color: var(--text-light); margin-top: 9px; letter-spacing: .5px; }
.case-img-full { margin: 26px 0 32px; }
.case-img-full img { width: 100%; height: auto; border-radius: 12px; box-shadow: 0 6px 24px rgba(0,0,0,.08); }
.case-img-full figcaption { text-align: center; font-size: 13px; color: var(--text-light); margin-top: 9px; letter-spacing: .5px; }
.case-card__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; z-index: 1; }
@media (max-width: 900px) {
  .case-layout { grid-template-columns: 1fr; gap: 30px; }
  .case-aside { position: static; }
}
@media (max-width: 560px) {
  .case-gallery { grid-template-columns: 1fr; }
}

/* ---------- Footer ---------- */
.footer { background: #08101F; color: rgba(255,255,255,.6); padding: 64px 0 0; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1.1fr; gap: 40px; padding-bottom: 46px; }
.footer__brand .logo { margin-bottom: 18px; }
.footer__brand .logo__name { color: #fff; }
.footer__brand .logo__sub { color: rgba(255,255,255,.4); }
.footer__brand p { font-size: 14px; line-height: 1.95; color: rgba(255,255,255,.48); max-width: 320px; }
.footer h4 { font-size: 15px; color: #fff; font-weight: 600; letter-spacing: 1.5px; margin-bottom: 20px; }
.footer ul li { margin-bottom: 11px; font-size: 14px; }
.footer ul li a { color: rgba(255,255,255,.52); }
.footer ul li a:hover { color: var(--accent); }
.footer__contact li { display: flex; gap: 8px; color: rgba(255,255,255,.52); }
.footer__contact li b { color: rgba(255,255,255,.75); font-weight: 400; flex-shrink: 0; }
.footer__contact li a { color: rgba(255,255,255,.72); text-decoration: none; transition: color .2s; }
.footer__contact li a:hover { color: var(--accent); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 22px 0;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 10px;
  font-size: 13.5px;
  color: rgba(255,255,255,.4);
}
.footer__bottom a:hover { color: var(--accent); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }
.reveal-d4 { transition-delay: .32s; }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  right: 26px; bottom: 26px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--primary);
  border: 0;
  color: #fff;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(13,91,233,.32);
  opacity: 0; visibility: hidden;
  transform: translateY(12px);
  transition: all .35s var(--ease);
  z-index: 900;
}
.to-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--primary-dark); transform: translateY(-3px); }
.to-top svg { width: 20px; height: 20px; stroke: #fff; }

/* ---------- 首页精选案例与作品 ---------- */
.feat-group { margin-top: 48px; }
.feat-group:first-of-type { margin-top: 40px; }
.feat-group__head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 22px;
}
.feat-group__title {
  font-size: 21px; font-weight: 700; color: var(--text-1); letter-spacing: 1px;
  display: flex; align-items: center; gap: 12px;
}
.feat-group__title::before {
  content: ""; width: 5px; height: 21px; border-radius: 3px;
  background: linear-gradient(180deg, #0D5BE9, #00A8FF);
}
.feat-group__more {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; letter-spacing: 1px; color: var(--primary); text-decoration: none;
}
.feat-group__more svg { width: 15px; height: 15px; transition: transform .25s var(--ease); }
.feat-group__more:hover svg { transform: translateX(4px); }
.feat-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .services, .brands, .honors, .team-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid, .work-grid, .entries, .culture-grid, .articles, .feat-cards { grid-template-columns: repeat(2, 1fr); }
  .clients { grid-template-columns: repeat(4, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .footer__grid { grid-template-columns: 1fr 1fr 1fr; }
  .hero__title { font-size: 48px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 26px; }
  .nav-toggle { display: block; }
  .header__cta .btn, .header__tel { display: none; }
  .nav {
    position: fixed;
    top: 74px; left: 0; right: 0;
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all .3s var(--ease);
  }
  .nav.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav a { color: var(--text-1) !important; padding: 13px 24px; border-radius: 0; text-align: left; }
  .nav a::after { display: none; }
  .nav a.is-active { color: var(--primary) !important; background: var(--bg-light); }

  .hero { padding: 120px 0 70px; min-height: auto; }
  .hero__title { font-size: 34px; letter-spacing: 2px; }
  .hero__slogan { font-size: 16px; letter-spacing: 3px; }
  .hero__desc { font-size: 14.5px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); gap: 26px; }
  .hero__stat b { font-size: clamp(22px, 6.5vw, 28px); }

  .page-hero { padding: 130px 0 60px; }
  .page-hero h1 { font-size: 28px; letter-spacing: 2px; }

  .services, .brands, .honors, .team-grid,
  .case-grid, .work-grid, .entries, .culture-grid,
  .articles, .feat-cards { grid-template-columns: 1fr; }
  .clients { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .form-row { grid-template-columns: 1fr; }
  .form-card { padding: 28px 22px; }
  .about-text h2 { font-size: 24px; }
  .cta-band h2 { font-size: 24px; }
  .footer__bottom { flex-direction: column; text-align: center; }
}